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Use Elasticsearch cat nodes API to understand the state of your Elasticsearch: id, name, IP address, CPU, load, memory, and much more.

Create your own cheatsheets in Bash.

Capture SLF4J + Logback logging events and test them in unit tests using ListAppender.

Elasticsearch Scroll API sample written in Java, useful for retrieving large numbers of results (or even all results) from a single search request.

Unit testing Akka actor with "TestActorRef", which gives you access to underlying actor instance and runs the logic synchronously in a single-threaded environment.

My Java and DevOps journey at Nuxeo and Datadog in 2019 as a software engineer. Also, my contributions to open-source project VAVR and technical blogging in my free time.

How to set up additional source directory (src/it/java) and resource directory (src/it/resources) for integration tests in Maven project using Build Helper Maven Plugin.

Three ways to create ArgumentCaptor in unit tests (Mockito JUnit Runner, annotations, or factory method) and its different usage.